And yes I know the link I gave isn't for your exact model but it works about the same for all Zens; hold some button (usually the Play-button) while powering on. If that doesn't work then maybe someone else knows the exact procedure. Anyway the options in the Recovery Mode is what you want to try to get your player working again.

EDIT:
I just found that there is no Recovery Mode on the Zen Nano Plus. Sorry for suggesting that. Instead, the advice seems to be to format it through Windows, which I think has a fair chance of fixing file system errors.www.pcdoctor-guide.com/wordpress/?p=3361

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